School board members said they were no longer supportive of the additions on Tuesday after a member of a bond watchdog group said the changes could affect voter trust.

"I do believe that adding the scope changes what was promised to voters," said Louis Fontenot, a Trammel Crow development manager who is part of the bond accountability committee. "It’s my duty to say that we need to stay with what was promised."

Also Tuesday, the district for the first time listed the 23 schools that could have lost out, under the plan, on funding for making buildings resistant to earthquakes, repairing roofs and improving handicapped access. (See list in document viewer below.)

Budgets for rebuilding Roosevelt, Grant and Franklin high schools are already $10 million over their estimated to cost of about $247 million because the student population is now expected to grow faster than initially projected.

Supporters of the additional $37 million for classroom space said extra rooms would help give high school students access to smaller classes. Students could also have access to more credits because more classes could be taught at once.

But the bulk of the money to offset the increased cost would come from eliminating or delaying seismic, roofing and handicap access projects scheduled for other schools.

Jim Owens, the executive director of the office of school modernization, said the changes would have cost about $25.7 million of approximately $68 million for the projects.

Veering off course from the capital bond’s initial plans could have hurt the district’s chances of passing future bond measures. In Portland Public Schools, officials were hoping to go for another massive rebuilding plan as soon as the 2016 ballot.

The statements about staying true to voters swayed board member Ruth Adkins. She had leaned toward approving the extra classrooms just weeks before.

“What we can’t change and we must not change is our promises to the voters,” Adkins said.

She also pointed out that the high schools would still be bigger than initial plans.

Meanwhile, board member Steve Buel said he felt like the board was "boxed in" by the decision presented by district officials. If staff and community input had been more involved before the bond, he said, they could have avoided the problem.

"We were stuck," Buel said. "It's too bad because we could have done a bond that would have been a little more flexible than we did."

Board member Tom Koehler said he felt there were ways to retain some of the extra classrooms without eliminating as many projects. “There is flexibility here,” he said.

Superintendent Carole Smith ultimately clarified that she would not be bringing forward a resolution for the additional classrooms again.

The decision disappointed some members of Our Portland, Our Schools, the organization that raised money for the $482 million bond. The group initially questioned the additional classrooms but later came to support it.

Paul Anthony, a member of the group, said the refusal to move forward hurts the high school projects. “Voters wanted viable high schools and this is going to keep them from doing that,” he said.

The changes proposed earlier this month would have added 12 classrooms to Grant and Franklin’s plans, for a total of 44 classrooms. Roosevelt High School would get three more classrooms to bring their total up to 35.